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# if two solid hemispheres of same base radius r are joined together along their bases, then curved surface area of this new solid is

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## If two solid hemispheres of same base radius r are joined together along their bases then curved sur...

Free solutions for Mathematics Exemplar Problems - class 10 Chapter 13 - Surface Areas and Volumes Surface Areas and Volumes - Exercise 12.1 question 9. These explanations are written by Lido teacher so that you easily understand even the most difficult concepts

## NCERT Exemplar Solutions Class 10 Mathematics Solutions for Surface Areas and Volumes - Exercise 12.1 in Chapter 12 - Surface Areas and Volumes

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If two solid hemispheres of same base radius r are joined together along their bases, then curved surface area of this new solid is

When two hemispheres of equal radii are joined base to base new solid becomes sphere and curved surface area of sphere is 4πr2.

So, the right option is (a).

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## Question 1 5 If two solid hemispheres of same base radius r are joined together along their bases the curved surface area of this new solid isA 4 π r2B 6 π r2C 3 π r 2D 8 π r2

Question 1 5 If two solid hemispheres of same base radius r are joined together along their bases the curved surface area of this new solid isA 4 π r2B 6 π r2C 3 π r 2D 8 π r2

Hemisphere and Its Surface Area

Question 1 5 ... Question Question 15

If two solid hemispheres of same base radius r are joined together along their bases the curved surface area of this new solid is

(A) 4 π r 2 (B) 6 π r 2 (C) 3 π r 2 (D) 8 π r 2 Open in App Solution

Option (A) is correct.

The curved surface area of a hemisphere is

2 π r 2

and here, we join solid hemispheres along their bases of radius r, from which we get a solid sphere. Hence, the curved surface area of new solid

= 2 π r 2 + 2 π r 2 = 4 π r 2 Suggest Corrections 15 Video Solution

EXEMP - Grade 10 - Mathematics - Surface Areas and Volumes - Q15

MATHEMATICS

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SIMILAR QUESTIONS

Q. If two solid-hemisphere s of same base radius r are joined together along their bases , then curved surface area of this new solid is

(a) π π 4πr2 (b) π π 6πr2 (c) π π 3πr2 (d) π π 8πr2

Q. If two solid hemispheres of same base radius r are joined together along their bases, then curved surface area of this new solid isQ. Question 1

Write ‘True’ or ‘False’ and justify your answer in the following :

Two identical solid hemispheres of equal base radius r cm are stuck together along their bases. The total surface area of the combination

6 π r 2 .

Q. Two identical solid hemispheres of equal base radius r cm are stuck together along their bases. The total surface area of the combination is _________.Q. Question 7

Two cones with same base radius 8 cm and height 15 cm are joined together along their bases. Find the surface area of the shape so formed.

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Hemisphere and Its Surface Area

Standard X Mathematics

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## If two solid hemispheres of same base radius r are joined together along their bases, then curved surface area of this new solid is

Click here👆to get an answer to your question ✍️ If two solid hemispheres of same base radius r are joined together along their bases, then curved surface area of this new solid is

Question

## If two solid hemispheres of same base radius r are joined together along their bases, then curved surface area of this new solid is

A4πr

2

B6πr

2

C3πr

2

D8πr

2 Medium Open in App

Updated on : 2022-09-05

Solution Verified by Toppr

Correct option is A)

We know that,

Curved surface area of a hemisphere =2πr

2

So, when two solids hemispheres of same base radius are joined together along their bases, then

Curved surface area of newly formed solid sphere=2×2πr

2 =4πr 2

Hence, A is the correct option.